* - deleted ports are only shown under the This port is required by section. It was harder to do for the Required section. Perhaps later...
Configuration Options

===> The following configuration options are available for firefox-esr-60.4.0_3,1:
CANBERRA=off: Sound theme alerts
DBUS=on: D-Bus IPC system support
DEBUG=off: Build with debugging support
DTRACE=on: Build with DTrace probes
FFMPEG=on: FFmpeg support (WMA, AIFF, AC3, APE...)
GCONF=on: GConf configuration backend support
LIBPROXY=off: Proxy support via libproxy
OPTIMIZED_CFLAGS=on: Use extra compiler optimizations
PROFILE=on: Build with profiling support
TEST=off: Build and/or run tests
WAYLAND=on: Wayland (graphics) support
====> Options available for the multi AUDIO: you have to choose at least one of them
ALSA=on: ALSA audio architecture support
JACK=on: JACK audio server support
PULSEAUDIO=on: PulseAudio sound server support
SNDIO=off: Sndio audio support
===> Use 'make config' to modify these settings

Followup on r483807.
jbeich commented on some ports in D17724 but I forgot to add them to the list.
Submitted by: rene
Reviewed by: bapt, jbeich
Differential Revision: https://reviews.freebsd.org/D17724

gecko: switch to clang70
Standardizing on one Clang version makes stability more predictable
across supported FreeBSD versions. As a side effect performance may
suffer some improvement. This also makes it easier to enable LTO as
old LLD versions are more buggy.

lang/rust: Update to 1.29.0
Release notes:
* https://blog.rust-lang.org/2018/07/20/Rust-1.27.2.html
* https://blog.rust-lang.org/2018/08/02/Rust-1.28.html
* https://blog.rust-lang.org/2018/09/13/Rust-1.29.html
Up to and including Rust 1.27.x, the Rust build system shelled out to
a configure script to detect the presence and usability of libunwind.
Since Rust 1.28.0, it's using a static result in a `build.rs` file and
expects libunwind to be used. It was not the case on FreeBSD so far, so
we need a patch to this `build.rs` to disable that. We still need to
study if the FreeBSD port should use libunwind and what to do with this
patch. But this problem prevented the update to Rust 1.28.0 already, so
enough delay.

www/firefox: document missing feature frequently asked on IRC/BMO
about:crashes is not supported on most Tier3 platforms. Even if someone
adopts devel/breakpad patches while filling the gaps without reproducibility
debugging symbols uploaded to Mozilla may not match the package.
https://searchfox.org/mozilla-central/rev/403038737ba7/old-configure.in#2699-2718
https://developer.mozilla.org/docs/Mozilla/Developer_guide/Uploading_symbols_to_Mozillas_symbol_server

gecko: mask as Linux on AMO for compatibility
Many extensions on addons.mozilla.org aren't listed or updated due to
platform whitelist abuse. On DragonFly the search is broken because
such a platform isn't recognized.
PR: 226919
Reported by: Graham Perrin

gecko: enable GCONF option by default
This is a build-only dependency used by default in upstream builds.
https://bugzilla.mozilla.org/show_bug.cgi?id=713827
https://bugzilla.mozilla.org/show_bug.cgi?id=1167201

gecko: speed up VP9 decoding on i386
Disable bundled FFmpeg decoders for VP* and FLAC on i386 as those don't
support SIMD optimizations due to build issues upstream. More recent
versions of those are already provided by multimedia/ffmpeg, anyway.
MFH: 2017Q4

gecko: stop calling home to check for updates after r436423
Upstream seems to define "default" as Nightly (custom build), not safe
to update automatically. Once we switched to proper channels updater
kicked in, except Mozilla never built binaries for FreeBSD. Not to
mention, vendor updates conflict with system package manager.
PR: 221541
MFH: 2017Q3